/**
 * Created with IntelliJ IDEA.
 * Description:
 * user:likai
 * Date:2022-11-21
 * Time:20:18
 */
public class NewTest {
    public static void main(String[] args) {
        StringBuffer s=new StringBuffer();
        s.append('d');
        s.append('d');
        System.out.println(s.toString());
    }
}
